生成方式的util已經在另一篇文章里說過啦，這篇文章要參考這以下的鏈接才能看得懂

java生成海報并保存-包括微信小程序帶場景值的二維碼

1、第一種是生成base64的格式這種也是比較常見的

@ApiOperation(value = "海報生成，返回的是base64圖片")@ApiImplicitParams(value = {@ApiImplicitParam(name = "publishId", value = "分享海報發布id", paramType = "query", dataType = "Long")})@GetMapping(value = "/index")public Result<Object> posterUtils(@RequestParam Long publishId) throws Exception {PublishDO publishDO = findPetService.findPublishById(publishId);//作為場景值Long userId;if (publishDO.getUserId() == 0) {userId = Long.parseLong(publishDO.getExtObj().getString("oid"));} else {UserDO userDO = userServices.findUserById(publishDO.getUserId());userId = userDO.getId();}Set<String> t = publishDO.getImages();Iterator<String> it = t.iterator();String str = "";while (it.hasNext()) {str = it.next();}BufferedImage bufferedImage=PosterUtils.createPoster(userServices.getAccessToken(), publishDO.getTitle(), userId, publishDO.getRewardAmount().toString(), str);ByteArrayOutputStream os = new ByteArrayOutputStream();ImageIO.write(bufferedImage, "jpg", os);String encodeStr = Base64.getEncoder().encodeToString(os.toByteArray());os.close();return new ResultUtil<>().setData(encodeStr);}

2、生成流方式，這分為讀取流和下載流?，先說讀取流 這個有點問題，當時使用的是小程序，在ios端是沒問題但是在安卓端出現了不能下載的問題，但是還是把代碼貼出來

@ApiOperation(value = "海報生成，返回的是圖片文件")@ApiImplicitParams(value = {@ApiImplicitParam(name = "publishId", value = "分享海報發布id", paramType = "query", dataType = "Long")})@GetMapping(value = "/mp")public void posterUtils(@RequestParam Long publishId,ServletResponse response) throws Exception {PublishDO publishDO = findPetService.findPublishById(publishId);//作為場景值Long userId;if (publishDO.getUserId() == 0) {userId = Long.parseLong(publishDO.getExtObj().getString("oid"));} else {UserDO userDO = userServices.findUserById(publishDO.getUserId());userId = userDO.getId();}Set<String> t = publishDO.getImages();Iterator<String> it = t.iterator();String str = "";while (it.hasNext()) {str = it.next();}BufferedImage bufferedImage=PosterUtils.createPoster(userServices.getAccessToken(), publishDO.getTitle(), userId, publishDO.getRewardAmount().toString(), str);ImageIO.write(bufferedImage, "jpg", response.getOutputStream());}

3、接下來是通用方法

@GetMapping(value = "/postImg/{publishId}/{fileName}")public void postImg(@PathVariable("publishId") Long publishId,@PathVariable("fileName") String fileName,ServletResponse response) throws Exception {PublishDO publishDO = findPetService.findPublishById(publishId);//作為場景值Long userId;if (publishDO.getUserId() == 0) {userId = Long.parseLong(publishDO.getExtObj().getString("oid"));} else {UserDO userDO = userServices.findUserById(publishDO.getUserId());userId = userDO.getId();}Set<String> t = publishDO.getImages();Iterator<String> it = t.iterator();String str = "";while (it.hasNext()) {str = it.next();}BufferedImage bufferedImage=PosterUtils.createPoster(userServices.getAccessToken(), publishDO.getTitle(), userId, publishDO.getRewardAmount().toString(), str);ImageIO.write(bufferedImage, "jpg", response.getOutputStream());}

這種使用參數然后把生成的流拼接成像圖片一樣的格式就ok啦

總結

以上是生活随笔為你收集整理的java 几种生成海报的方式的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。